Add svm attribute to iommu to enable/disable shared virtual memory capability for intel-iommu.
Signed-off-by: Zhenzhong Duan <[email protected]> --- docs/formatdomain.rst | 6 +++ src/conf/domain_conf.c | 16 ++++++++ src/conf/domain_conf.h | 1 + src/conf/domain_validate.c | 3 ++ src/conf/schemas/domaincommon.rng | 5 +++ src/qemu/qemu_validate.c | 6 +++ .../intel-iommu-svm.x86_64-latest.args | 34 +++++++++++++++++ .../intel-iommu-svm.x86_64-latest.xml | 37 +++++++++++++++++++ tests/qemuxmlconfdata/intel-iommu-svm.xml | 37 +++++++++++++++++++ tests/qemuxmlconftest.c | 1 + 10 files changed, 146 insertions(+) create mode 100644 tests/qemuxmlconfdata/intel-iommu-svm.x86_64-latest.args create mode 100644 tests/qemuxmlconfdata/intel-iommu-svm.x86_64-latest.xml create mode 100644 tests/qemuxmlconfdata/intel-iommu-svm.xml diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst index 14fe85e817..8ca6aa02b3 100644 --- a/docs/formatdomain.rst +++ b/docs/formatdomain.rst @@ -9495,6 +9495,12 @@ Examples: Max supported value is 20 according to PCI spec, pasid is disabled if 0. :since:`Since 12.8.0` (QEMU/KVM and ``intel`` model only) + ``svm`` + Enable shared virtual memory, it exposes the necessary hardware + capabilities to the guest operating system so that devices can share + the exact same virtual address space as user-space applications. + :since:`Since 12.8.0` (QEMU/KVM and ``intel`` model only) + In case of ``virtio`` IOMMU device, the ``driver`` element can optionally contain ``granule`` subelement that allows to choose which granule will be used by default. It is useful when running guests with different page size diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 7b8a7e7c68..462873bfb9 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -14790,6 +14790,10 @@ virDomainIOMMUDefParseXML(virDomainXMLOption *xmlopt, &iommu->pasid_bits) < 0) return NULL; + if (virXMLPropTristateSwitch(driver, "svm", VIR_XML_PROP_NONE, + &iommu->svm) < 0) + return NULL; + if ((granule = virXPathNode("./driver/granule", ctxt))) { g_autofree char *mode = virXMLPropString(granule, "mode"); unsigned long long size; @@ -16903,6 +16907,7 @@ virDomainIOMMUDefEquals(const virDomainIOMMUDef *a, a->scalable_mode != b->scalable_mode || a->fsts != b->fsts || a->pasid_bits != b->pasid_bits || + a->svm != b->svm || a->xtsup != b->xtsup || a->pt != b->pt || a->granule != b->granule) @@ -22859,6 +22864,13 @@ virDomainIOMMUDefCheckABIStability(virDomainIOMMUDef *src, virTristateSwitchTypeToString(src->pasid_bits)); return false; } + if (src->svm != dst->svm) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Target domain IOMMU device shared virtual memory '%1$s' does not match source '%2$s'"), + virTristateSwitchTypeToString(dst->svm), + virTristateSwitchTypeToString(src->svm)); + return false; + } if (src->pt != dst->pt) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Target domain IOMMU device passthrough '%1$s' does not match source '%2$s'"), @@ -29326,6 +29338,10 @@ virDomainIOMMUDefFormat(virBuffer *buf, virBufferAsprintf(&driverAttrBuf, " pasid_bits='%u'", iommu->pasid_bits); } + if (iommu->svm != VIR_TRISTATE_SWITCH_ABSENT) { + virBufferAsprintf(&driverAttrBuf, " svm='%s'", + virTristateSwitchTypeToString(iommu->svm)); + } if (iommu->pt != VIR_TRISTATE_SWITCH_ABSENT) { virBufferAsprintf(&driverAttrBuf, " passthrough='%s'", virTristateSwitchTypeToString(iommu->pt)); diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 16d3006c6f..87767e30f9 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -3107,6 +3107,7 @@ struct _virDomainIOMMUDef { virTristateSwitch scalable_mode; virTristateSwitch fsts; virTristateSwitch pasid_bits; + virTristateSwitch svm; virTristateSwitch xtsup; virTristateSwitch pt; int granule; /* -1 means 'host', 0 unset, page size in KiB otherwise */ diff --git a/src/conf/domain_validate.c b/src/conf/domain_validate.c index fb89dcb8aa..524d0559ae 100644 --- a/src/conf/domain_validate.c +++ b/src/conf/domain_validate.c @@ -3205,6 +3205,7 @@ virDomainIOMMUDefValidate(const virDomainIOMMUDef *iommu) iommu->scalable_mode != VIR_TRISTATE_SWITCH_ABSENT || iommu->fsts != VIR_TRISTATE_SWITCH_ABSENT || iommu->pasid_bits != 0 || + iommu->svm != VIR_TRISTATE_SWITCH_ABSENT || iommu->xtsup != VIR_TRISTATE_SWITCH_ABSENT || iommu->pt != VIR_TRISTATE_SWITCH_ABSENT || iommu->granule != 0) { @@ -3234,6 +3235,7 @@ virDomainIOMMUDefValidate(const virDomainIOMMUDef *iommu) iommu->scalable_mode != VIR_TRISTATE_SWITCH_ABSENT || iommu->fsts != VIR_TRISTATE_SWITCH_ABSENT || iommu->pasid_bits != 0 || + iommu->svm != VIR_TRISTATE_SWITCH_ABSENT || iommu->pci_bus >= 0 || iommu->accel != VIR_TRISTATE_SWITCH_ABSENT || iommu->cmdqv != VIR_TRISTATE_SWITCH_ABSENT || @@ -3264,6 +3266,7 @@ virDomainIOMMUDefValidate(const virDomainIOMMUDef *iommu) iommu->dma_translation != VIR_TRISTATE_SWITCH_ABSENT || iommu->scalable_mode != VIR_TRISTATE_SWITCH_ABSENT || iommu->fsts != VIR_TRISTATE_SWITCH_ABSENT || + iommu->svm != VIR_TRISTATE_SWITCH_ABSENT || iommu->pasid_bits != 0 || iommu->pci_bus >= 0 || iommu->accel != VIR_TRISTATE_SWITCH_ABSENT || diff --git a/src/conf/schemas/domaincommon.rng b/src/conf/schemas/domaincommon.rng index 888d0db214..afd506af60 100644 --- a/src/conf/schemas/domaincommon.rng +++ b/src/conf/schemas/domaincommon.rng @@ -6439,6 +6439,11 @@ <ref name="uint8"/> </attribute> </optional> + <optional> + <attribute name="svm"> + <ref name="virOnOff"/> + </attribute> + </optional> <optional> <attribute name="xtsup"> <ref name="virOnOff"/> diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c index c343843068..b81ea7f6eb 100644 --- a/src/qemu/qemu_validate.c +++ b/src/qemu/qemu_validate.c @@ -5866,6 +5866,12 @@ qemuValidateDomainDeviceDefIOMMU(const virDomainIOMMUDef *iommu, _("iommu: unsupported pasid bit width. Max value supported is 20 according to PCI spec")); return -1; } + if (iommu->svm != VIR_TRISTATE_SWITCH_ABSENT && + !virQEMUCapsGet(qemuCaps, QEMU_CAPS_INTEL_IOMMU_SVM)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("iommu: svm is not supported with this QEMU binary")); + return -1; + } /* While QEMU_CAPS_ARM_SMMUV3_ACCEL tracks the .accel attribute of * arm-smmuv3 it is also a good indicator of .ats, .ril, .ssidsize, and diff --git a/tests/qemuxmlconfdata/intel-iommu-svm.x86_64-latest.args b/tests/qemuxmlconfdata/intel-iommu-svm.x86_64-latest.args new file mode 100644 index 0000000000..e2f5adfc93 --- /dev/null +++ b/tests/qemuxmlconfdata/intel-iommu-svm.x86_64-latest.args @@ -0,0 +1,34 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1 \ +USER=test \ +LOGNAME=test \ +XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.local/share \ +XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.cache \ +XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \ +/usr/bin/qemu-system-x86_64 \ +-name guest=QEMUGuest1,debug-threads=on \ +-S \ +-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-QEMUGuest1/master-key.aes"}' \ +-machine q35,usb=off,kernel_irqchip=split,dump-guest-core=off,memory-backend=pc.ram,acpi=off \ +-accel kvm \ +-cpu qemu64 \ +-m size=219136k \ +-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":224395264}' \ +-overcommit mem-lock=off \ +-smp 1,sockets=1,cores=1,threads=1 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-display none \ +-no-user-config \ +-nodefaults \ +-chardev socket,id=charmonitor,fd=@mon-fd@,server=on,wait=off \ +-object '{"qom-type":"monitor-qmp","id":"monitor","chardev":"charmonitor"}' \ +-rtc base=utc \ +-no-shutdown \ +-boot strict=on \ +-device '{"driver":"intel-iommu","id":"iommu0","scalable-mode":true,"fsts":true,"pasid-bits":6}' \ +-audiodev '{"id":"audio1","driver":"none"}' \ +-global ICH9-LPC.noreboot=off \ +-watchdog-action reset \ +-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \ +-msg timestamp=on diff --git a/tests/qemuxmlconfdata/intel-iommu-svm.x86_64-latest.xml b/tests/qemuxmlconfdata/intel-iommu-svm.x86_64-latest.xml new file mode 100644 index 0000000000..05361ececd --- /dev/null +++ b/tests/qemuxmlconfdata/intel-iommu-svm.x86_64-latest.xml @@ -0,0 +1,37 @@ +<domain type='kvm'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219100</memory> + <currentMemory unit='KiB'>219100</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='q35'>hvm</type> + <boot dev='hd'/> + </os> + <features> + <ioapic driver='qemu'/> + </features> + <cpu mode='custom' match='exact' check='none'> + <model fallback='forbid'>qemu64</model> + </cpu> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu-system-x86_64</emulator> + <controller type='pci' index='0' model='pcie-root'/> + <controller type='usb' index='0' model='none'/> + <controller type='sata' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/> + </controller> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <audio id='1' type='none'/> + <watchdog model='itco' action='reset'/> + <memballoon model='none'/> + <iommu model='intel'> + <driver scalable_mode='on' fsts='on' pasid_bits='6' svm='on'/> + </iommu> + </devices> +</domain> diff --git a/tests/qemuxmlconfdata/intel-iommu-svm.xml b/tests/qemuxmlconfdata/intel-iommu-svm.xml new file mode 100644 index 0000000000..05361ececd --- /dev/null +++ b/tests/qemuxmlconfdata/intel-iommu-svm.xml @@ -0,0 +1,37 @@ +<domain type='kvm'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219100</memory> + <currentMemory unit='KiB'>219100</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='q35'>hvm</type> + <boot dev='hd'/> + </os> + <features> + <ioapic driver='qemu'/> + </features> + <cpu mode='custom' match='exact' check='none'> + <model fallback='forbid'>qemu64</model> + </cpu> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu-system-x86_64</emulator> + <controller type='pci' index='0' model='pcie-root'/> + <controller type='usb' index='0' model='none'/> + <controller type='sata' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/> + </controller> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <audio id='1' type='none'/> + <watchdog model='itco' action='reset'/> + <memballoon model='none'/> + <iommu model='intel'> + <driver scalable_mode='on' fsts='on' pasid_bits='6' svm='on'/> + </iommu> + </devices> +</domain> diff --git a/tests/qemuxmlconftest.c b/tests/qemuxmlconftest.c index bc83367cd8..39b6749a18 100644 --- a/tests/qemuxmlconftest.c +++ b/tests/qemuxmlconftest.c @@ -2992,6 +2992,7 @@ mymain(void) DO_TEST_CAPS_LATEST("intel-iommu-scalable-mode"); DO_TEST_CAPS_LATEST("intel-iommu-fsts"); DO_TEST_CAPS_LATEST("intel-iommu-pasid-bits"); + DO_TEST_CAPS_LATEST("intel-iommu-svm"); DO_TEST_CAPS_LATEST_PARSE_ERROR("intel-iommu-wrong-machine"); DO_TEST_CAPS_LATEST_ABI_UPDATE("intel-iommu-eim-autoadd"); DO_TEST_CAPS_LATEST_ABI_UPDATE("intel-iommu-eim-autoadd-v2"); -- 2.52.0
